1、在web.xml添加filter
<filter> <filter-name>contextfilter</filter-name> <filter-class>com.cf.hr.filter.WebContextFilter</filter-class> </filter> <filter-mapping> <filter-name>contextfilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
2、filter实现
import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletResponse; public class WebContextFilter implements Filter { @Override public void destroy() { // TODO Auto-generated method stub } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletResponse httpServletResponse = (HttpServletResponse) response; httpServletResponse.setHeader("Access-Control-Allow-Origin", "*"); httpServletResponse.setHeader("Access-Control-Allow-Headers", "accept,content-type"); httpServletResponse.setHeader("Access-Control-Allow-Methods", "OPTIONS,GET,POST,DELETE,PUT"); chain.doFilter(request, httpServletResponse); } @Override public void init(FilterConfig arg0) throws ServletException { // TODO Auto-generated method stub } }